Fungicidal mixture

Abstract

Fungicidal mixtures, comprising A) imidazole derivatives of the formula I  in which R 1 and R 2 are halogen or phenyl which may be substituted by halogen or alkyl or R 1 and R 2 together with the bridging C═C double bond form a 3,4-difluoromethylenedioxyphenyl group; R 3 is cyano or halogen, and R 4 is dialkylamino or isoxazol-4-yl which may carry two alkyl radicals; and B) carbamates of the formula II,  in which n is 1 or 2 and Y is halogen, alkyl or haloalkyl, where the radicals Y may be different if n is 2; and C) amide compounds of the formula III  in which Z 1 and Z 2 are identical or different and are haloge nitro, cyano, alkyl, alkenyl, alkynyl, haloalkyl, haloalkenyl, haloalkynyl, alkoxy, haloalkoxy, haloalkylthio alkylsulfinyl or alkylsulfonyl; in a synergistically effective amount, methods for controlling harmful fungi using mixtures of the compounds I, II and III and the use of the compounds I, II and III for preparing such mixtures are described.

We claim:  
     
         1 . A fungicidal mixture, comprising 
 A) imidazole derivatives of the formula I                           in which R 1  and R 2  are halogen or phenyl which may be substituted by halogen or C 1 -C 4 -alkyl or R 1  and R 2  together with the bridging C═C double bond form a 3,4-difluoromethylenedioxyphenyl group; 
 R 3  is cyano or halogen, and  
 R 4  is di(C 1 -C 4 -alkyl)amino or isoxazol-4-yl which may carry two C 1 -C 4 -alkyl radicals; and  
   B) carbamates of the formula II,                           in which n is 1 or 2 and Y is halogen, C 1 -C 4 -alkyl or C 1 -C 2 -haloalkyl, where the radicals Y may be different if n is 2; and    C) amide compounds of the formula III                           in which Z 1  and Z 2  are identical or different and are halogen, nitro, cyano, C 1 -C 8 -alkyl, C 2 -C 8 -alkenyl, C 2 -C 8 -alkynyl, C 1 -C 8 -haloalkyl, C 2 -C 8 -haloalkenyl, C 2 -C 8 -haloalkynyl, C 1 -C 8 -alkoxy, C 1 -C 8 -haloalkoxy, C 1 -C 8 -haloalkylthio, C 1 -C 8 -alkylsulfinyl or C 1 -C 8 -alkylsulfonyl;    in a synergistically effective amount.    
     
     
         2 . A fungicidal mixture as claimed in  claim 1  where the imidazole derivative I corresponds to the formula Ia.  
       
         
           
           
               
               
           
         
       
     
     
         3 . A fungicidal mixture as claimed in  claim 1  where the imidazole derivative I corresponds to the formula Ib  
       
         
           
           
               
               
           
         
       
       where X is chlorine or bromine.  
     
     
         4 . A fungicidal mixture as claimed in  claim 1 , wherein the weight ratio of the compounds I:II and I:III is in each case from 20:1 to 1:20.  
     
     
         5 . A method for controlling harmful fungi, which comprises treating the harmful fungi, their habitat, or the plants, seeds, soils, areas, materials or spaces to be kept free from them with imidazole derivatives of the formula I as set forth in  claim 1 , carbamates of the formula II as set forth in  claim 1  and amide compounds of the formula III as set forth in  claim 1 .  
     
     
         6 . A method as claimed in  claim 5 , wherein imidazole derivatives of the formula I as set forth in  claim 1 , carbamates of the formula II as set forth in  claim 1  and amide compounds of the formula III as set forth in  claim 1  are applied simultaneously, i.e. either jointly or separately, or successively.  
     
     
         7 . A method as claimed in  claim 5  or  6 , wherein the imidazole derivatives of the formula I as set forth in  claim 1  are applied in an amount of from 0.01 to 2.5 kg/ha.  
     
     
         8 . A method as claimed in any of  claims 5  to  7 , wherein the carbamates of the formula II as set forth in  claim 1  are applied in an amount of from 0.01 to 10 kg/ha.  
     
     
         9 . A method as claimed in any of  claims 5  to  8 , wherein the amide compounds of the formula III as set forth in  claim 1  are applied in an amount of from 0.01 to 10 kg/ha.  
     
     
         10 . A fungicidal composition which is conditioned in three parts, one part comprising imidazole derivatives of the formula I as set forth in  claim 1  in a solid or liquid carrier, the second part comprising carbamates of the formula II as set, forth in  claim 1  in a solid or liquid carrier and the third part comprising amide compounds of the formula III as set forth in  claim 1  in a solid or liquid carrier.